Tendonitis, more properly termed tendinosis, results from acute or chronic stress of the rotator cuff tendons. Rotator cuff impingement results from repeated irritation of the rotator cuff beneath the acromial arch. 20 Repetitive overhead reaching and weight training are frequent precipitants of rotator cuff tendinosis and impingement. Rotator cuff tendinosis is diagnosed by eliciting pain or weakness with stress testing of the rotator cuff muscles. There are two common tests used for diagnosis of impingement. The Hawkins' test elicits pain with the shoulder passively flexed to 90 degrees and internally rotated. 21 The Neer's test elicits pain with passive abduction of the shoulder to 180 degrees. 22 Radiographs, if obtained, may show calcific deposits in the subacromial space or at the insertion of the supraspinatus tendon to the greater tuberosity. In cases of impingement, curvature of the acromion process may be seen.